Chehalis spring chinook in the upper basin should more or less be original native stock as they separated temporally from the fal chinook. One of the last places where you can say that about springers. Lots of streams above barriers in the upper Chehalis basin and all over W WA also support cutthroat populations that have never been compromised. So there are a few places left out there, but not many. I can remember when the Clearwater (Queets) received the first steelhead hatchery plants. And Forks Creek on the Willapa more recently. Prior to that they were managed for wild steelhead production, but may have seen a few strays.